Google Chrome before 8.0.552.237 and Chrome OS before 8.0.552.344 do not properly handle a mismatch in video frame sizes, which allows remote attackers to cause a denial of service (incorrect memory access) or possibly have unspecified other impact via unknown vectors.
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.